I've been involved in businesses wasting money on patents a few times. It's a game for big companies now, as the ability to defend your patent is directly tied to your funding. I've also been in small manufacturing for a long time. You make your money while you can and you move on.
If its something that you really believe will be making money for you for a long time, file your provisional application and start selling them. If it doesn't work out, at least you aren't out the patent money. If its making good sales, use your profits to pay for the patent process. I've watched too many people spend a lot of their starting capital getting a patent, waiting for the patent to start making sales, trying to license the patent etc, and living a poor quality of life because they spent first, instead of making sales.